Full mould casting (also knownprocess) is a new kind of . That is to adopt paraffin or foam models, whose sizes and shapes are similar to the ones of castings, to bind with each other to form one a manifold model, and then bury into dry quartz sand for having jolt molding operation after painting fireproof coating upon the surface and drying. Due to the under negative pressure, the moulds will be vaporized completely and liquid metals will enter into inner parts of the moulds.
As dry sand among binderless often has layer collapse in molding process, A.Wittemoser from Germany firstly adopted called as “Magnetic Molding Process” in 1967. And Nagano from Japan invented(namely, ) in 1971. Inspired by them, the modern full mould casting process also uses the vacuum casting method to immobilize sand in many applications. Therefore, full mould casting has had a great development around the world in the past 20 years.
Shortcomings and Limitations
Full mould casting process is the same as other process. And it also has its own shortcomings and limitations. As not all the manufacture of castings are fit for applying full mould casting. You can refer to the following factors for making the judgment. 1. Batch Sizes of Castings, 2. Materials of Castings, 3. Sizes of Castings, 4. Structures of Castings.